Murray 1948 Journal May 10 San Jose de Comondú, 700ft., Baja California Caught 1♂ Perognathus spinatus in my traps. Last night Levis found a Bufo punctatus, and Beust a Phyllostactylus unitu, the latter among the rocks on the hillside. At about 8 AM Levis and I climbed the high hillside on the SW side again looking for bat caves. Of all those which appeared large from below there was only one partially concealed entrance which led into a big one, this at the base of the cliff in an area of metamorphic slaty rock. Most of the hill was lava. The mouth was about 10ft across, leading into a chamber of the same width and over 20 feet long. This had a high domed roof and branched into two small passages running upward. Each terminated in a very high crevice extending out of sight and other crannies in various directions. There was a connection between the two. The floor was a deep mass of guano, yet we did not see more than 6 bats at the most. Those were stirred up by shooting and were able to move around so freely that we were not in a position to catch them. I netted 1♂ Macrotus californicus and Levis shot